diff options
Diffstat (limited to 'hw/tpm')
| -rw-r--r-- | hw/tpm/tpm_tis.c | 60 |
1 files changed, 21 insertions, 39 deletions
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index 45d7b8c..ac5d5c6 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -68,8 +68,7 @@ typedef struct TPMState { MemoryRegion mmio; unsigned char buffer[TPM_TIS_BUFFER_MAX]; - uint16_t w_offset; - uint16_t r_offset; + uint16_t rw_offset; uint8_t active_locty; uint8_t aborting_locty; @@ -257,7 +256,7 @@ static void tpm_tis_tpm_send(TPMState *s, uint8_t locty) "tpm_tis: To TPM"); /* - * w_offset serves as length indicator for length of data; + * rw_offset serves as length indicator for length of data; * it's reset when the response comes back */ s->loc[locty].state = TPM_TIS_STATE_EXECUTION; @@ -265,7 +264,7 @@ static void tpm_tis_tpm_send(TPMState *s, uint8_t locty) s->cmd = (TPMBackendCmd) { .locty = locty, .in = s->buffer, - .in_len = s->w_offset, + .in_len = s->rw_offset, .out = s->buffer, .out_len = s->be_buffer_size, }; @@ -347,8 +346,7 @@ static void tpm_tis_new_active_locality(TPMState *s, uint8_t new_active_locty) /* abort -- this function switches the locality */ static void tpm_tis_abort(TPMState *s, uint8_t locty) { - s->r_offset = 0; - s->w_offset = 0; + s->rw_offset = 0; DPRINTF("tpm_tis: tis_abort: new active locality is %d\n", s->next_locty); @@ -415,8 +413,7 @@ static void tpm_tis_request_completed(TPMIf *ti) tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID | TPM_TIS_STS_DATA_AVAILABLE); s->loc[locty].state = TPM_TIS_STATE_COMPLETION; - s->r_offset = 0; - s->w_offset = 0; + s->rw_offset = 0; tpm_tis_show_buffer(s->buffer, s->be_buffer_size, "tpm_tis: From TPM"); @@ -441,14 +438,14 @@ static uint32_t tpm_tis_data_read(TPMState *s, uint8_t locty) len = MIN(tpm_cmd_get_size(&s->buffer), s->be_buffer_size); - ret = s->buffer[s->r_offset++]; - if (s->r_offset >= len) { + ret = s->buffer[s->rw_offset++]; + if (s->rw_offset >= len) { /* got last byte */ tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID); tpm_tis_raise_irq(s, locty, TPM_TIS_INT_STS_VALID); } DPRINTF("tpm_tis: tpm_tis_data_read byte 0x%02x [%d]\n", - ret, s->r_offset - 1); + ret, s->rw_offset - 1); } return ret; @@ -483,26 +480,14 @@ static void tpm_tis_dump_state(void *opaque, hwaddr addr) (int)tpm_tis_mmio_read(opaque, base + regs[idx], 4)); } - DPRINTF("tpm_tis: read offset : %d\n" + DPRINTF("tpm_tis: r/w offset : %d\n" "tpm_tis: result buffer : ", - s->r_offset); + s->rw_offset); for (idx = 0; idx < MIN(tpm_cmd_get_size(&s->buffer), s->be_buffer_size); idx++) { DPRINTF("%c%02x%s", - s->r_offset == idx ? '>' : ' ', - s->buffer[idx], - ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : ""); - } - DPRINTF("\n" - "tpm_tis: write offset : %d\n" - "tpm_tis: request buffer: ", - s->w_offset); - for (idx = 0; - idx < MIN(tpm_cmd_get_size(s->buffer), s->be_buffer_size); - idx++) { - DPRINTF("%c%02x%s", - s->w_offset == idx ? '>' : ' ', + s->rw_offset == idx ? '>' : ' ', s->buffer[idx], ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : ""); } @@ -567,9 +552,9 @@ static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr, val = TPM_TIS_BURST_COUNT( MIN(tpm_cmd_get_size(&s->buffer), s->be_buffer_size) - - s->r_offset) | s->loc[locty].sts; + - s->rw_offset) | s->loc[locty].sts; } else { - avail = s->be_buffer_size - s->w_offset; + avail = s->be_buffer_size - s->rw_offset; /* * byte-sized reads should not return 0x00 for 0x100 * available bytes. @@ -833,8 +818,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, switch (s->loc[locty].state) { case TPM_TIS_STATE_READY: - s->w_offset = 0; - s->r_offset = 0; + s->rw_offset = 0; break; case TPM_TIS_STATE_IDLE: @@ -852,8 +836,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, break; case TPM_TIS_STATE_COMPLETION: - s->w_offset = 0; - s->r_offset = 0; + s->rw_offset = 0; /* shortcut to ready state with C/R set */ s->loc[locty].state = TPM_TIS_STATE_READY; if (!(s->loc[locty].sts & TPM_TIS_STS_COMMAND_READY)) { @@ -879,7 +862,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, } else if (val == TPM_TIS_STS_RESPONSE_RETRY) { switch (s->loc[locty].state) { case TPM_TIS_STATE_COMPLETION: - s->r_offset = 0; + s->rw_offset = 0; tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID| TPM_TIS_STS_DATA_AVAILABLE); @@ -917,8 +900,8 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, } while ((s->loc[locty].sts & TPM_TIS_STS_EXPECT) && size > 0) { - if (s->w_offset < s->be_buffer_size) { - s->buffer[s->w_offset++] = + if (s->rw_offset < s->be_buffer_size) { + s->buffer[s->rw_offset++] = (uint8_t)val; val >>= 8; size--; @@ -928,13 +911,13 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, } /* check for complete packet */ - if (s->w_offset > 5 && + if (s->rw_offset > 5 && (s->loc[locty].sts & TPM_TIS_STS_EXPECT)) { /* we have a packet length - see if we have all of it */ bool need_irq = !(s->loc[locty].sts & TPM_TIS_STS_VALID); len = tpm_cmd_get_size(&s->buffer); - if (len > s->w_offset) { + if (len > s->rw_offset) { tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_EXPECT | TPM_TIS_STS_VALID); } else { @@ -1023,8 +1006,7 @@ static void tpm_tis_reset(DeviceState *dev) s->loc[c].ints = 0; s->loc[c].state = TPM_TIS_STATE_IDLE; - s->w_offset = 0; - s->r_offset = 0; + s->rw_offset = 0; } tpm_tis_do_startup_tpm(s, s->be_buffer_size); |